1401865469 has 2 divisors, whose sum is σ = 1401865470. Its totient is φ = 1401865468.

The previous prime is 1401865463. The next prime is 1401865471. The reversal of 1401865469 is 9645681041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1398012100 + 3853369 = 37390^2 + 1963^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1401865469 is a prime.

It is a super-2 number, since 2×1401865469² = 3930453586349179922, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1401865471, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1401865463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 700932734 + 700932735.

It is an arithmetic number, because the mean of its divisors is an integer number (700932735).

Almost surely, 2^1401865469 is an apocalyptic number.

It is an amenable number.

1401865469 is a deficient number, since it is larger than the sum of its proper divisors (1).

1401865469 is an equidigital number, since it uses as much as digits as its factorization.

1401865469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 1401865469 is about 37441.4939472238. The cubic root of 1401865469 is about 1119.1855976339.

The spelling of 1401865469 in words is "one billion, four hundred one million, eight hundred sixty-five thousand, four hundred sixty-nine".